Alder lake (i5-12500h) + hfi lpm enabled = Unsupported HFI event ignored #98

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1. zhang-rui commented on May 30, 2025

   

   zhang-rui

   on May 30, 2025

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   this happens if lpmd gets two HFI hints with no LPM cpus in a row.
   the logic is like this

   if hfi hints has LPM cpus
   use the LPM cpus as active cpus
   else if we already use LPM cpus from HFI
   we resume and use all online cpus
   else /* current HFI hints don't have LPM CPUs, prev HFI hints don't have LPM cpus neither */
   print Unsupported HFI event ignored
2. zhang-rui commented on May 30, 2025

   

   zhang-rui

   on May 30, 2025

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   After a second thought, the "Unsupported HFI event ignored" message is not helpful at all.

   Let me cook up a patch to remove the last check.

   Thanks for the report.
3. zhang-rui commented on May 30, 2025

   

   zhang-rui

   on May 30, 2025

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   can you tell me the name/email I should use if I want to add your reported-by tag?
6. hansbogert commented on Aug 23, 2026

   

   hansbogert

   on Aug 23, 2026

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   So is lpmd supposed to work at all with ADL? I'm still seeing this with latest main:

   [1787494989][INFO]			Unsupported HFI event ignored